Blocking pin for preventing gas leak



1. Blocking pin for preventing gas leak

1.1: Perspective

1.2: Front

1.3: Back

1.4: Left

1.5: Right

1.6: Top

1.7: Bottom

1.8: Reference

1.9: Reference

The broken lines shown in Figures 1.8 and 1.9 depict environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a blocking pin for preventing gas leak, as shown and described. 